Cisco Systems OL-7426-03 Manual De Usuario

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The Cisco WLAN Solution also uses manual and automated Disabling to block access to network 
services. In manual Disabling, the operator blocks access using client MAC addresses. In 
automated Disabling, which is always active, the Operating System software automatically 
blocks access to network services for an operator-defined period of time when a client fails to 
authenticate for a fixed number of consecutive attempts. This can be used to deter brute-force 
login attacks.

 features use industry-standard authorization and 

authentication methods to ensure the highest possible security for your business-critical wireless LAN 
traffic.
For information about Cisco WLAN Solution wired security, refer to 

Cisco WLAN Solution Wired Security

Many traditional Access Point vendors concentrate on security for the Wireless interface similar to that 
described in the 

 section. However, for secure Cisco Wireless LAN Controller 

Service Interfaces (

, and 

), 

Cisco Wireless LAN Controller to AP, and inter-Cisco Wireless LAN Controller communications during 
device servicing and 

, the Operating System includes built-in security.

Each Cisco Wireless LAN Controller and Cisco 1000 Series lightweight access point is manufactured with 
a unique, signed X.509 certificate. This certificate is used to authenticate IPSec tunnels between 
devices. These IPSec tunnels ensure secure communications for mobility and device servicing.
Cisco Wireless LAN Controllers and Cisco 1000 Series lightweight access points also use the signed 
certificates to verify downloaded code before it is loaded, ensuring that hackers do not download 
malicious code into any Cisco Wireless LAN Controller or Cisco 1000 Series lightweight access point. 
For information about Cisco WLAN Solution wireless security, refer to 

.

Layer 2 and Layer 3 LWAPP Operation

The LWAPP communications between Cisco Wireless LAN Controller and Cisco 1000 Series lightweight 
access points can be conducted at ISO Data Link Layer 2 or Network Layer 3.

Operational Requirements

The requirement for Layer 2 LWAPP communications is that the Cisco Wireless LAN Controller and Cisco 
1000 Series lightweight access points must be connected to each other through Layer 2 devices on the 
same subnet. This is the default operational mode for the Cisco WLAN Solution. Note that when the 
Cisco Wireless LAN Controller and Cisco 1000 Series lightweight access points are on different subnets, 
these devices must be operated in Layer 3 mode.
The requirement for Layer 3 LWAPP communications is that the Cisco Wireless LAN Controllers and 
Cisco 1000 Series lightweight access points can be connected through Layer 2 devices on the same 
subnet, or connected through Layer 3 devices across subnets.
Note that all Cisco Wireless LAN Controllers in an 

 must use the 

same LWAPP Layer 2 or Layer 3 mode, or you will defeat the Mobility software algorithm.

Configuration Requirements

When you are operating the Cisco WLAN Solution in Layer 2 mode, you must configure a 

 to control your Layer 2 communications. 

When you are operating the Cisco WLAN Solution in Layer 3 mode, you must configure a 

 to control your Layer 2 communications, and an 

 to control Cisco 1000 

Series lightweight access point-to-Cisco Wireless LAN Controller Layer 3 communications.